Ali

If the 10A is a fuse/breaker then it is too big, your drivers are only good for 8 amp. Calculate the current for your motor based on how you are going to wire them (parallel/series) if you are wiring them parallel then go on 2/3 of the total motor current.

For your step/direction wiring use a twisted pair preferably shielded, so on the 2M880N take one twisted pair to the PLS+ PLS- then the other twisted pair to the DIR+ DIR- the PLS+ then goes to the step pin on the PCPPS V3 the DIR+ to the Direction pin on the PCPPS V3 then join both NEG wires and join then to a GRD on the PCPPS V3.

If you are using the charge pump I would not bother with the enable signal (FREE+ FREE-) just implement a PROPER e stop circuit that will kill all movement and disable the primary side of the power supplies. DO NOT rely on MACH or any other control software for your E-Stop circuit you are using very powerful motors they will not stop if you get in the way!!!.

Have a read of this on the Gecko website this might help when working out motor currents etc.

http://www.geckodrive.com/support.aspx?q=10005#Power Supplies

Andy